3.2. Dynamik

The dynamics apply a more „real feeling“ to the brush by
connecting one or more of the brush parameters to the way of using the
brush. You may for instance let the width of the pencil vary according to
the speed of the stylus or the mouse, make the color saturation
depending on the stylus pressure, make the color changing as the
direction of the brush changes on the canvas, and so on. You may choose
among several presets or define your own. The dynamics are created to be
used together with drawing tablets, but some are available using the mouse.

The dynamics will make some of the behaviors of the drawing tools act more
like the physical („real“) tools.

Abbildung 14.50. Dynamics in Tool Options

The Dynamics in Tool Options Dialog

The Dynamics Preset List

The Dynamics area in the Tool Option dialog shows from left to right, the
button to open the list containing the available dynamic presets, a field
displaying the name of the current preset, and rightmost the edit button.
Click on the
button to open the dialog window displaying the available dynamics presets
and select another preset.

From this dialog you can select from all the available presets, just
as from the list of dynamics presets. In addition there are five
buttons:

Edit dynamics: Click on this to edit the selected dynamics.

Create a new dynamics: Do just that.

Duplicate this dynamics: Make a copy of the selected dynamics.

Delete this dynamics: Delete the selected dynamics.

Refresh dynamics: Update the dynamics list.

3.2.2. Editing Paint Dynamics

Abbildung 14.52. Editing Paint Dynamics

The Paint Dynamics Editor can be called from:

the edit button in the Tool Options dialog,

the Paint Dynamics selection dialog by clicking either the
Edit Dynamics button or the Create
a New Dynamics button.

You select the desired behaviors by clicking in the small squares.
Clicking a second time will unselect the marking.

Anmerkung

Pre-installed dynamics are grayed out meaning you are not allowed to
change the settings. To edit the options you have to work on a copy
made from one of the pre-installed dynamics or create a new dynamics.

3.2.3. The Paint Dynamics Matrix

The main part of the edit dialog is a table where you can decide
which brush parameters should be affected by the way you use the stylus
or the mouse. You can enable as many parameters and parameter
combinations you want, but usually the fewer the better.

Each column in the table represents a stylus or mouse action except
the random and the fade functions. All functions works with graphic
tablet. Some of the functions are also available using the mouse. These
functions are marked in the tables. The descriptions are using the
default settings of all functions

Pressure: It allows you to decide which
aspects of the tool's action will be affected by pressing the
stylus against the tablet.

Velocity: (mouse) This is the speed of
the brush.

Direction: (mouse) This is the moving direction
of the brush.

Tilt: The behavior of the function depends
on the tilting of the stylus.

Wheel: The output depends on the rotation of
the stylus or the setting of the wheel on the airbrush pen.

Random: (mouse) The selected option will
change at random.

Fade: (mouse) The selected option will be
faded in or out depending on the settings of the fade options in
the Dynamic Options menu of the Tools Option dialog.

Each row shows a brush parameter and seven checkboxes, one for
each action. You connect the parameters to the actions by clicking
the appropriate boxes. Clicking on a selected box will unselect the
connection.

Deckkraft

Pressure: Press harder to make the drawing
less transparent.

Velocity: (mouse) The opacity decreases as
the speed of the stylus increases.

Direction: (mouse) The opacity depends on
the direction of the stylus or the mouse. The effect seems to
have a touch of randomness built in.

Tilt: The opacity depends on the tilt of
the stylus.

Wheel: TO DO

Random: (mouse) The opacity changes at
random in the interval set by the opacity slider in the Tool
Options dialog.

Fade: (mouse) Starting with full transparency
and ending with the opacity set by the opacity slider in the
Tool Options dialog.

Größe

Pressure: Press harder to make the brush
wider.

Velocity: (mouse) Increasing speed decreases
the width of the brush.

Direction: (mouse) The size of the brush
depends on the moving direction of the stylus or the mouse. The
effect seems to have a touch of randomness built in.

Tilt: The size of the brush depends on the
tilt of the stylus.

Wheel: TODO

Random: (mouse) The size of the brush
changes at random up to the size set in the brush size slider
in the Tool Options dialog.

Fade: (mouse) Fades from a narrow brush to
the size set by the brush size slider in the Tools Options dialog.

Winkel

ZU ERLEDIGEN

Farbe

By default the color is picked from the foreground color in the
toolbox. However, if the color is activated in the dynamics
editor, the color is instead collected from the active gradient.

Velocity: (mouse) At slow speeds the color
is collected from the right side of the gradient. As the speed
increase the color is picked more and more from the left side
of the gradient.

Direction: (mouse) The direction determine
where on the gradient the color is picked from. The effect seems
to work a bit on random.

Random: (mouse) The color is picked at
random from the gradient.

Fade: (mouse) The start color is collected
from the left side of the gradient and then more and more from
the right side during the stroke. The behavior of the fading is
set in the Fade Options in the Tool Options Dialog.

Härte

The hardness option is useful only for fuzzy brushes.

Velocity: (mouse) At slow speed the brush
is hard and become more fuzzy as the speed increase.

Random: (mouse) The fussiness of the brush
varies at random.

Fade:(mouse) The brush become less fuzzy
during the stroke. The behavior of the fading is set in the Fade
Options in the Tool Options Dialog.

Kraft

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Seitenverhältnis

The Aspect Ratio Slider in the Tool Options Dialog must be set
to other values than the default value of 0.00 to activate the
dynamics. If the aspect ratio slider is set to a negative value
the width of the brush will vary while the height of the brush
is constant. If the slider is set to a positive value only the
height of the brush will vary.

Velocity: (mouse) The aspect
ratio of the brush (width / height) varies with the speed of
the brush.

Direction: (mouse) The aspect ratio of the
brush varies with the moving direction of the brush. The effect
seems to have a touch of randomness built in.

Random: (mouse) The aspect ratio of the
brush varies at random.

Fade: (mouse) If the Aspect Ratio Slider
is set to a positive value the brush will fade from full height
at the start of the stroke to the height set by the aspect ratio
slider. If the slider is set to a negative value the brush fades
from full width to the width set by the aspect ratio slider. The
behavior of the fading is set in the Fade Options in the Tool
Options Dialog.

Abstand

Spacing is the distance between the marks set by the brush when
drawing lines. With this option set the spacing is affected by how
the stylus or mouse is used.

Velocity: (mouse) The spacing between the
footprints of the brush increases with increasing speed.

Direction: (mouse) The spacing varies with
the moving direction of the brush. The effect seems to have a
touch of randomness built in.

Random: (mouse) The spacing varies at random.

Fade: (mouse) Starting with a wide spacing
and gradually make the spacing narrower. The behavior of the
fading is set in the Fade Options in the Tool Options Dialog.

The actions of these tools are more or less quick. The amount
of Rate depends on the setting of the Rate slider in the Tool
Options dialog.

Fluss

Significant only for the Airbrush: more or less paint is delivered.
The amount of flow depends on the setting of the Flow slider in the
Tool Options dialog.

Zittern

Normally the brush draws a line by printing the brush marks close
together. Adding jitter means that the brush prints are scattered
along the line. The amount of scattering depends on the setting
of the jitter slider in the Tool Options dialog window.

Pressure: At low pressure the brush prints
are spread according to the value set in the jitter amount
slider. As the pressure increases the scattering amount decreases.

Velocity: (mouse) At slow speed the brush
prints are spread according to the value set in the jitter amount
slider. As the speed increase the scattering amount decrease.

Direction: (mouse) The jitter effect depends
on the direction of the brush. The effect seems to have a touch
of randomness built in.

Random: (mouse)The jitter varies at random.

Fade: (mouse) Starting with no jitter
and ending with the amount of jitter set in the jitter amount
slider. The behavior of the fading is set in the fade options
in the Tool Options dialog.

3.2.4. Customizing the Dynamics

Abbildung 14.53. Customizing the Dynamics

If the current options do not suits you, you may fine-tune the settings
from the Paint Dynamics Editor. Click on the down arrow to open the
drop down menu and then select what option to change.

Abbildung 14.54. The Fine Tuning Curve

Click on one of the options to open the customizing dialog. The upper
part of the dialog contains a curve where you can adjust the behaviour
of the chosen parameters selected in the lower part of the dialog. You
can drag the curve by pointing on it with the mouse pointer, holding
down the left mouse button and the move the curve wherever you want
inside the diagram.

3.2.5. Beispiele für Dynamik

Abbildung 14.55. Optionen der Dynamik

The brush strokes

The brush size - fade curve

The color - fade curve

The examples shown are very brief, but will perhaps give you an idea
of how to use this functions. Feel free to try other combinations. In
these examples the foreground color is set to blue (#0000ff) and the
background color to yellow (#ffff00). Fading: 200 pixels. Paintbrush
size: 72. All other settings are the default values except for those
values changed

Example 1 shows the result when the brush size is connected to the
fading. Default options. The brush size starts as zero and increase
to the size set in the brush size slider in the Tools Options Dialog.

In example 2 the brush size is still connected to the fade tool,
but the fade curve is set as in image 5. The brush size starts at
zero, fades up to full size and then fades down to zero again.

The full fade length is set along the x-axis from left to right. The
y-axis determines the size of the brush. At the bottom the brush size
is zero, and at the top of the diagram the brush is set to the full
size according to the size set in the slider in the Brush Options
Dialog. Study the example and the curve to see the relationship.

In example 3 the brush size is disconnected from the fade tool. The
color is connected with the fade option with the curve set as in
image 6. At the start of the drawing the color is picked from the
left side of the gradient, then gradually more from the right side
of the gradient and then finally fading back to the left side again.

As usual the x-axis is the total fade length. When the curve is
near the bottom of the diagram the color is picked from the left
side of the gradient. With the curve at the top of the diagram
the color is picked from the right side of the gradient.

The last example shows a combination of these two settings. Both
the size of the brush and the color are connected to the fading
function with the curves set as in image 5 and 6.

3.2.6. Optionen der Dynamik

Abbildung 14.56. Optionen der Dynamik

Many of the dynamics behaviors also depends on the settings of the
Dynamics Options in the Tool Options dialog and vice versa. For example
the fading will not work if it is not applied in the Dynamics section.

Verblassen-Optionen

This slider determines the length of the fading. What will
actually happen depends on the setting of the Dynamic. If
set to act on the color for example, the color will be taken from
the current gradient starting from the left side of the gradient
and moving toward the right side of the gradient.

The Fade Options has a drop down list determining how the
fading is repeated.

Abbildung 14.57.
Illustration of the effects of the three gradient-repeat
options, for the Abstract 2 gradient.

Farbverlauf „Abstract 2“

Keine

Sägezahnwelle

Dreieckswelle

This option determines what happens if a brush stroke extends
farther than the Length specified by the slider. There are three
possibilities: